“…These hydrogels are particularly interesting, given their inherent versatility and multifaceted applications, 539 and have not only become materials of choice in the design of systems for flexible electronics, 50,51,252,372 but also a reliable and valuable option in the design of classical energy systems, 520,540,541 aligning well with the growing demand for new clean methodologies and green technologies. 438,542 Indeed, when summarising the tremendous changes in the way we have looked at, made, and used materials over the last few decades, the selection of materials stands as the most critical aspect, as it becomes absolutely crucial whenever ecologically sound, cost-effective, and flexible devices are at stake.…”